All's good
*Similar to with previous techniques, I inhale and hold the gathered air in my lungs, infusing it with my fuuton chakra. After a short while, I prep the weapons and exhale the air over both of them - A bone sword and ordinary shuriken. The wind flows along each of the weapons and augmenting their general ability. As a demonstration, I toss the shuriken forth as to cut and barrage through one of the training dummies. Wielding the bone sword, I stab it forwards through the chest of a second. The wind vastly increases the range and cutting power of the ordinary shuriken to the point that it severs the the first dummy horizontally in half. On the other hand, the wind compliments the natural shape of the bone sword in allowing it to more easily puncture objects, drilling through the clones chest with remarkable ease.*
Pro: You can strengthen your weapons natural abilities, creating more opportunities for use and being far more damaging than previously.
Con: I can't think of too many cons for this technique :x Maybe that it's short range, as in you have to be wielding the weapons before using this technique on them.